Imaging lens assembly, imaging lens assembly module and electronic device

An imaging lens assembly, comprising:

• a plurality of lens elements, an optical axis defined via the lens elements;
• a light path folding element configured to fold the optical axis, and the light path folding element comprising:
• an optical surface, a total reflection of an imaging light of the imaging lens assembly occurring at least once on the optical surface;
• and
• a sheet-like light blocking element corresponding to the light path folding element, and the sheet-like light blocking element comprising:
• a first surface facing towards the optical surface;
• a second surface disposed relatively to the first surface;
• and
• a microstructure layer at least disposed on the first surface, and a plurality of protrusions formed on the first surface via the microstructure layer;
• wherein at least partial area between the microstructure layer and the optical surface has an air slit;
• wherein a surface of the microstructure layer is measured according to ISO25178 standard, a number of peaks per square millimeter of the microstructure layer is Ypd, and the following condition is satisfied:
• 20000 (1/mm2)≤Ypd≤110000 (1/mm2);
• wherein the surface of the microstructure layer is measured according to ISO25178 standard, an equivalent line and an areal material ratio curve are obtained, a core height is defined by 0% to 100% of the equivalent line corresponding to the areal material ratio curve, a reduced peak is a portion of the areal material ratio curve higher than the core height, an average height of the reduced peak is Aph;
• the surface of the microstructure layer is measured according to ISO25178 standard, a number of the peaks of the microstructure layer larger than the core height and larger than 4 μm is Hpq, and at least one of the following conditions is satisfied:
• 2.0 μm≤Aph≤40.1 μm;
• 2≤Hpq≤400.

An imaging lens assembly, comprising:

• an optical element;
• and
• a sheet-like light blocking element corresponding to the optical element, and the sheet-like light blocking element comprising:
• a first surface facing towards the optical element;
• a second surface disposed relatively to the first surface;
• and
• a microstructure layer at least disposed on the first surface, and a plurality of protrusions formed on the first surface via the microstructure layer;
• wherein at least partial area between the microstructure layer and the optical element has an air slit;
• wherein a surface of the microstructure layer is measured according to ISO25178 standard, a number of peaks per square millimeter of the microstructure layer is Ypd;
• the surface of the microstructure layer is measured according to ISO25178 standard, an equivalent line and an areal material ratio curve are obtained, a core height is defined by 0% to 100% of the equivalent line corresponding to the areal material ratio curve, a reduced peak is a portion of the areal material ratio curve higher than the core height, an areal material ratio that divides a core surface from the reduced peak is Ymr1, and the following conditions are satisfied:
• 20000 (1/mm2)≤Ypd≤110000 (1/mm2);
• and
• 17%≤Ymr1≤45%.

An imaging lens assembly, comprising:

• an optical element;
• and
• a sheet-like light blocking element corresponding to the optical element, and the sheet-like light blocking element comprising:
• a first surface facing towards the optical element;
• a second surface disposed relatively to the first surface;
• and
• a microstructure layer at least disposed on the first surface, and a plurality of protrusions formed on the first surface via the microstructure layer;
• wherein at least partial area between the microstructure layer and the optical element has an air slit;
• wherein a surface of the microstructure layer is measured according to ISO25178 standard, a number of peaks per square millimeter of the microstructure layer is Ypd, and the following condition is satisfied:
• 20000 (1/mm2)≤Ypd≤110000 (1/mm2);
• wherein the surface of the microstructure layer is measured according to ISO25178 standard, an equivalent line and an areal material ratio curve are obtained, a core height is defined by 0% to 100% of the equivalent line corresponding to the areal material ratio curve, a reduced peak is a portion of the areal material ratio curve higher than the core height, an average height of the reduced peak is Aph;
• the surface of the microstructure layer is measured according to ISO25178 standard, a number of the peaks of the microstructure layer larger than the core height and larger than 4 μm is Hpq, and at least one of the following conditions is satisfied:
• 2.0 μm≤Aph≤40.1 μm;
• 2≤Hpq≤400.